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12 August 2008 Lens-free focusing of Gaussian beams
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Proceedings Volume 7099, Photonics North 2008; 70991J (2008)
Event: Photonics North 2008, 2008, Montréal, Canada
This paper studies the diffraction in the near-field of a monochromatic Gaussian beam by a sequence of parallel coaxial circular apertures. A method to design diffraction-based and wavelength-specific focusing systems through a sequence of circular apertures, using confocal Fresnel ellipsoids, is detailed. The results obtained with this research show that the design method introduced here is valid and can be used to focus electromagnetic beams without traditional refractive lenses.
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Gabrielle Thériault, Réal Tremblay, and Nathalie McCarthy "Lens-free focusing of Gaussian beams", Proc. SPIE 7099, Photonics North 2008, 70991J (12 August 2008);

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